If two angles and are complementary angle, let us show that

cotβ + cosβ =

Let us show that:

sec70°sin20° + cos20°cosec70° = 2

If two angles and are complementary angle, let us show that

sin²α + sin²β = 1

If two angles and are complementary angle, let us show that

If sin 17° = , let us show that sec 10° - sin73° =