alleryWhich acute angle has equal squared sine and cosine?
A30°
B60°
C15°
D45°
Answer & Solution
Correct answer: D. 45°
Positive equal sine and cosine give tan A = 1, so A = 45°.
Keep practising Trigonometry
Browse all Trigonometry questions for ICSE Class 10, or explore more Mathematics topics.
Related questions
An equation true for all values of the variables involved is called an:In the word trigonometry, the Greek root 'tri' means:Tap every prime numberIf the sum of the first $n$ terms of an AP is $S_n=4n-n^2$, what is the $n$th term of the Fill the gaps on coordinate geometryMatch each average to its meaningIf the two lines represented by a pair of linear equations intersect at a single point, thIn an equation written as y = 3 x - 6, the dependent variable is