Victoria V. answered • 07/24/19
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15+ Years Experience Teaching / Tutoring Trigonometry
Emily G.
asked • 07/24/19half-angle-formula
give that cos x=(4/5) and 0 degrees < x < 90 degrees. determine the exact values of sin (x/2), cos (x/2) and tan (x/2). show work and rationalize.
Can someone show how to do cos and tan for this problem?
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2 Answers By Expert Tutors
Aaron E. answered • 07/24/19
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Master of Physics and by extension Trigonometry
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