Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 15)
Which of the following statements is correct in relation to the trigonometric ratios and angles in a triangle?
The sine of an angle is equivalent to the cosine of its complement.
The sine and cosine of an angle are always the same.
The tangent of an angle and its supplement are always equivalent.
All of the options
Explanation
sin(θ) = cos(90° - θ) where (90° - θ) is the complement.
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