Q. 27
Prove that:
Answer :
Proof:
Take LHS:
Let 2θ = 45°
We know,
{∵ cot 45° = 1}
Formula used:
cot θ < 0 as θ is in 1st quadrant.
So,
Hence Proved
Rate this question :
How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Trigonometric Ratios of Sub Angles35 mins
Trigonometric Functions - 0568 mins
Trigonometric Functions - 0152 mins
Graphs of trigonometric ratios | Trigonometric Identities39 mins
Trigo ratios for compound angles48 mins
Conditional Identities31 mins
Transformation formula in compound angles | Interactive Quiz37 mins
Quiz on Graph of Trigonometric Ratios40 mins
Trigonometry ratios of allied angles | Interactive Quiz38 mins
Trigonometric Ratios of Multiple & Sub Multiple Angles40 mins
Trigonometric Ratios of Sub Angles35 minsTrigonometric Functions - 0568 minsTrigonometric Functions - 0152 minsGraphs of trigonometric ratios | Trigonometric Identities39 minsTrigo ratios for compound angles48 minsConditional Identities31 minsTransformation formula in compound angles | Interactive Quiz37 minsQuiz on Graph of Trigonometric Ratios40 minsTrigonometry ratios of allied angles | Interactive Quiz38 minsTrigonometric Ratios of Multiple & Sub Multiple Angles40 minsTry our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
view all courses
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
RELATED QUESTIONS :
If 
and x lies in IInd quadrant, find the values of 
and 
If a cos 2x + b sin 2x = c has α and β as its roots, then prove that
If a cos 2x + b sin 2x = c has α and β as its roots, then prove that
If a cos 2x + b sin 2x = c has α and β as its roots, then prove that
Prove that:
If 
and 
prove that 
Prove that:
If 
and 
find the value of sin 4x.
If sec (x + α) + sec(x - α) = 2 sec x, prove that cos x
Prove that:
