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### High School Mathematics - 210.13 Trignometric Identities - 1

 Q 1: Show that (1/cos ) - cos = tan . sin Answer: Q 2: Show that tan2 + tan4 = sec4 - sec2Answer: Q 3: Show that cot + tan = sec . cosec for 00 < < 900Answer: Q 4: Show that (sin + cos )2 + (sin - cos )2 = 2Answer: Q 5: Show that cos3 + sin3 = (cos + sin )(1 - sin cos )Answer: Q 6: Show that (sin + cos )2 = 1 + 2 sin cos Answer: Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!

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